HTHP refers to a synthetic diamond manufacturing process that involves subjecting carbon under extreme heat and pressure conditions to create diamonds.

Through HTHP devices, genuine diamonds can be made from scratch in a controlled environment and existing diamonds can have their color grade improved to make them whiter.


In HTHP diamond synthesis, a small diamond seed is placed in a press along with a carbon source, such as graphite. The press applies high temperatures reaching around 1,500 to 2,000 degrees Celsius and pressures ranging from 5 to 7 gigapascals (GPa), which is roughly 50,000 to 70,000 times atmospheric pressure.

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Rough Diamonds

  • Cost-Effective

    Lab-grown diamonds are typically more affordable than natural diamonds.

  • Quality and Clarity

    Lab-grown diamonds possess the same chemical composition and physical properties as natural diamonds.

  • Environmental Sustainability

    LGD production requires significantly fewer resources and has a lower carbon footprint compared to diamond mining.

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